Shield or cover for hot-air flues.



3. K. DAVIS.

SHIELD OR COVER FOR HOT AIR FLUES.

APPLICATION FILED OCT. 12. 1911.

1,2?4,996, Patented Aug. 6,1918

nnazmumm, wAsmNomN. a. c.

' reasonable profit.

" "iosararm'ktavis, 0F MAY Q' mmoisv SHIELD oR covER'FoItHorAIn mes -"s c'iscation qr Letters Patent.

Patented Augifi, 1 1s.

' Applicationfiled0ctober 12,1917i.Seria1Ng.196,144.;;-

To (ZZZ whom itmag/concerm- 5.

Be it known that I, J osErHINEf K-.,--Dav1s, a citizen of the United States, residing at Maywood,in the countypf @ook, State of Illinois, have invented a new an d..,; us ef.ul Shield or Cover for Hotr, ;,i;1,.;I* -lues; and I do hereby declare the followingtobe'ga full, clear, and exact description of the invention,:=. such as will :enable others skilled in; the art to which it appertains to l11tl 6"&1'1d.;

use the same.

This invention relates to an improved shield or cover for the outlet end of a hot air flue, and one of the objects of the invention is to provide an improved, simple and efficient device of this kind, Which may be manufactured for a small cost sold at a A further object of the invention is to provide a shield or cover to cover the grating of the outlet end of the hot air flue, to prevent dust, when sweeping the room, from entering the flue, and to prevent the smoke from passing out into the room when making the fire in the furnace.

A further object of the invention is to provide improved means for securing the shield or cover to the grate of the outlet end of the flue, and to provide means to insure a tight joint between the grate plate and the cover or shield.

In practical fields the details of construction may necessitate alterations falling within the scope of what is claimed.

The invention comprises further features and combination of parts as hereinafter set forth, shown in the drawings and claimed.

In the drawings Figure 1 is a view in perspective of a portion of the floor and a wall of a room, showing the cover or shield as applied to the grate of the outlet of a hot air flue.

Fig. 2 is asectional view on line 22 of Fig. 1.

Fig. 3 is a perspective view of another form of shield or cover as applied to the grate of the outlet end of a fiue.

Fig. 4 is a sectional view on line 4.4 Fig. 3.

Fig. 5 is a perspective view of the shield or cover shown in Figs. 3 and 4, showing the inner face thereof.

Referring more especially to the drawings, 1 designates the outlet opening of a hot air flue 2 which may lead from a furnace or the like (not shown), and 3 denotesa rectangular, metallic frame fitting said outlet open ng.v ."Journaled in bearings of the upp erand lower walls of thejframe 3 are the; upperv and lower ,pintles .4 and-,5 of the vertically {disposed damper slats blades 6.-

Tlielower pintles .5- are provided with gears 7 and mounted iin suitable guides .of, a.

pocket 8 below the franie B is a rack bar 9.

Pivoted .at=;.1.0..between lugs .11 is a toothed segment 12, which has a handle l3 oscillating in a slot or opening 14: of a flange15 of the frame 3. This flange overlies the wall surrounding the opening 1 of the flue. It will be seen that by oscillating the handle 13, swinging the segment 12, the rack 9 Wlll be reciprocated, which will rotate or rock the gears 7, consequently opening or closing the damper slats 6. When the slats or-dampers are closed, they will. overlap each other. The frame 3 is provided with transversely and vertically disposed intersecting grate bars 16 and 17, and 18 denotes the improved shield or cover plate, which is designed to engage the outer faces of the grate bars, to prevent smoke and the" like from entering the room when making the fire in the furnace, and to prevent dust from entering the flue when cleaning the room. This shield or cover plate is provided with openings 19 and adjoining flanges 20. Screws 21 pass through the openings 19 and are provided with hooked ends 22, adapted to engage the grate bars, as shown in Fig. 2. By setting up on the wing nuts 23 (which are threaded upon the screws 21), the hooked ends may be drawn in close engagement with the grate bars. since the wing nuts act against the flanges 20, thereby holding the shield or cover plate 18 in place. In Figs. 3, 4 and 5 the cover plate or shield on its outer face is provided with a bead 24 conforming to the rectangular shape of the shield. The inner face of the cover plate or canvas, preferably a composition of asbestos,-

to engage the flange 15 of the frame 3, to insure a tight joint between said flange and the shield or cover plate. Riveted as at 27 to the inner face of the shield or cover plate are substantially U-shaped fasteners 28, the

spring arms of which pass through the open,-

ing between the vertical and horizontal.

grate bars. The spring arms of'the fasteners In combination; an outlet opening of a hot" air flue, a frame having grate bars mounted in said opening, a cover plate engagingover the'grat'e bars, the inner faceof'said shield having a pair of Ushaped spring fasteners provided With-bulged spring arms to'hold the:

passing between the grate bars,

apart the bulges engage on the inner part cess'or groove, and a packing fitting vin saidgroove between the shield and the frame, thereby insuring a: tight joint.

In testimony whereof I have signed my name to this specification in the" presence of tWo subscribing Witnesses.

J OSEPHINEK. DAVIS.

Witnesses:

E. C; KosKoBA, W. F. GRIMES.

Copies of this'patent 'may be obtained for fiir e' cent s each, by addressing the-'Gommissionerfofi Pmtentag: v

Washington, D. 9. i 

